Raccoons, mink, fisher, all like duck dinners also. I lost many to fox, when they stayed in the pond they were all right. Every time a duck would start sitting it would disapear. Then my neighbor warned me a mink was in his pond. I ended up giving them all away. The only ones I lost to snapping turtles was little ones, and there were huge turtles in my pond. I had one duck hatch out 25 little ones, when over half of them dissapeared is when I got rid of all of them. I do miss them, and thought about maybe getting flying mallards next time, they might avoid predators better, might have more instinct.